| Adam John Clarke | Director | 24 Nov 1998 | 5 Nov 2002 | British | 59 years |
| Alan Sharp | Director | 20 Feb 1992 | 16 May 1994 | British | 81 years |
| Barbara Plucnar Jensen | Director | 3 Oct 2016 | 28 Feb 2019 | Danish | 55 years |
| Bruce Andrew Van Der Waag | Director | 13 May 2019 | 22 Oct 2021 | Dutch | 60 years |
| Christopher Ian Mclain | Director | 7 Jan 2009 | 31 Jul 2009 | British | 62 years |
| Christopher Ian Mclain | Director | 20 Feb 1992 | 6 Jan 1997 | British | 62 years |
| Colin Robert Tennent | Director | 20 Feb 1992 | 3 Oct 2008 | British | 62 years |
| David Thomas Simons | Director | 31 Jul 2000 | 8 Mar 2001 | British | 74 years |
| David Thomas Simons | Director | 10 Jan 2005 | 7 Jan 2009 | British | 74 years |
| David Thomas Simons | Secretary | 8 Mar 2001 | 7 Jan 2009 | British | - |
| Duncan Scarr Hall | Director | 24 Nov 1998 | 31 Mar 2000 | British | 58 years |
| Edward Charles Chandler | Director | 3 Oct 2008 | 13 Nov 2009 | British | 48 years |
| Edward Charles Chandler | Secretary | 7 Jan 2009 | 13 Nov 2009 | British | - |
| Franciscus Oswaldus Bosch | Director | 1 Sept 1993 | 18 Nov 1996 | Dutch | 60 years |
| Gary Coyle | Director | 24 Nov 1998 | 23 Sept 2004 | British | 59 years |
| Gary John Kidd | Director | 20 Jan 2015 | 1 Sept 2016 | British | 62 years |
| Gavin Scarr Hall | Director | 7 Feb 1995 | 30 Jun 2000 | British | 60 years |
| George Lilley | Director | 20 Feb 1992 | 23 Jul 1997 | British | 67 years |
| Ian Davidson | Director | 5 Oct 2009 | 20 Jan 2015 | British | 63 years |
| Ian Scarr Hall | Director | 20 Feb 1992 | 8 Mar 2001 | British | 88 years |
| Jamie Reynolds | Director | 7 Jan 2009 | 16 Oct 2009 | British | 51 years |
| Jeffrey Rutter | Director | 24 Nov 1998 | 16 Jan 2001 | British | 71 years |
| John Davy | Director | 13 Nov 2009 | 20 Jan 2015 | British | 70 years |
| Jorn Vestergaard | Director | 1 Jun 2015 | 3 Oct 2016 | Danish | 58 years |
| Matthew Brabin | Secretary | 20 Jan 2015 | 13 Nov 2015 | - | - |
| Matthew Edward Stanley Brabin | Director | 20 Jan 2015 | 13 Nov 2015 | British | 61 years |
| Matthew Edward Stanley Brabin | Director | 1 Aug 2016 | 16 Jun 2020 | British | 61 years |
| Paul Andrew Cottam | Director | 1 May 1996 | 31 May 2001 | British | 60 years |
| Peter George Eardley | Director | 7 Feb 1995 | 5 Jan 2001 | British | 82 years |
| Philip John Leigh | Director | 28 Feb 2019 | 28 Feb 2021 | British | 59 years |
| Philip Newton White | Director | 20 Feb 1992 | 19 Jan 1994 | British | 74 years |
| Philip Newton White | Secretary | 20 Feb 1992 | 19 Jan 1994 | British | - |
| Purvin Kumar Madhusudan Patel | Director | 16 Jun 2020 | 23 Dec 2020 | British | 53 years |
| Raymond Jones | Director | 20 Feb 1992 | 31 Jul 1995 | British | 90 years |
| Raymond Taylor | Director | 24 Nov 1998 | 23 Jun 2004 | British | 57 years |
| Richard Ian Sykes | Director | 20 Jan 2015 | 1 Aug 2016 | British | 56 years |
| Ruth Scarr Hall | Director | 20 Feb 1992 | 8 Mar 2001 | British | 82 years |
| Ruth Scarr Hall | Secretary | 3 Feb 1994 | 8 Mar 2001 | British | - |
| Stephanie Louise Hamilton | Director | 22 Feb 2021 | 31 Jul 2021 | British | 55 years |